An iron-biochar composite from co-pyrolysis of incinerated sewage sludge ash and peanut shell for arsenic removal: Role of silica
文献类型：期刊论文
| 作者 | Wang, Qiming2,3,4; Li, Jiang-shan1,3; Poon, Chi Sun2,3,4 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2022-11-15 |
| 卷号 | 313期号:-页码:- |
| 关键词 | Incinerated sewage sludge ash Iron-biochar Arsenic removal Waste management |
| ISSN号 | 0269-7491 |
| 英文摘要 | Modification of biochar by low-cost iron sources has gained increasing attention to improve pollutants removal performance and reduce production costs compared to conventional chemical modifications. While such iron sources generally have complex compositions, their effects on properties of the iron-biochar composite are not well investigated. This study produced an iron-biochar (RBC) composite from co-pyrolysis of incinerated sewage sludge ash (ISSA) and peanut shell, and examined the role of silica with widespread existence in ISSA and other low-cost iron sources on properties of the iron-biochar composite relevant to As(III)/As(V) removal. Silica was found to react with iron during the pyrolysis process at 850. C and formed iron silicon at the expense of producing zero valent iron and Fe3O4 which resulted in a poorer removal efficacy for As(III) and As(V) compared to the iron-biochar (FBC) made from pure Fe2O3 and peanut shell. Moreover, a high leaching of reactive silica from RBC was observed which affected the formation of corrosion products of ZVI and competed with arsenic for active adsorption sites. Despite this, RBC still exhibited a maximum adsorption capacity of 17.44 and 57.56 mg/g towards As(III) and As(V) respectively at pH 3.0. Overall, this study provides an interesting insight into upcycling ISSA into useful media for sorptive removal of arsenic from aqueous solutions. |
| 学科主题 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000891414700001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35014]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China 2.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 3.IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Hung Hom, Kowloon, Hong Kong 4.Research Centre for Resources Engineering Towards Carbon Neutrality, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong |
| 推荐引用方式 GB/T 7714 | Wang, Qiming,Li, Jiang-shan,Poon, Chi Sun. An iron-biochar composite from co-pyrolysis of incinerated sewage sludge ash and peanut shell for arsenic removal: Role of silica[J]. ENVIRONMENTAL POLLUTION,2022,313(-):-. |
| APA | Wang, Qiming,Li, Jiang-shan,&Poon, Chi Sun.(2022).An iron-biochar composite from co-pyrolysis of incinerated sewage sludge ash and peanut shell for arsenic removal: Role of silica.ENVIRONMENTAL POLLUTION,313(-),-. |
| MLA | Wang, Qiming,et al."An iron-biochar composite from co-pyrolysis of incinerated sewage sludge ash and peanut shell for arsenic removal: Role of silica".ENVIRONMENTAL POLLUTION 313.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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